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  1. Infinispan
  2. ISPN-6341

StateTransferManager should be the first component to stop

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      When a cache stops, it first removes the component registry from the GlobalComponentsRegistry's namedComponents map, which means the node (let's call it A) will reply with a CacheNotFoundResponse to any remote command.

      Another node B trying to execute a write/transactional command will receive the CacheNotFoundResponse, assume that a new cache topology with id current topology id + 1 is coming soon, and wait for that new topology before retrying.

      Normally this is not a problem, because StateTransferManagerImpl.stop() sends a CacheTopologyControlCommand(LEAVE) to the coordinator quickly enough, then B receives the current topology id + 1 topology and retries the command.

      But in some cases, the cache components that stop before StateTransferManagerImpl can take a long time to do so. In particular, because of ISPN-5507, TransactionTable can block for cacheStopTimeout if there are remote transactions in progress, even though the cache can no longer process remote commands.

      We should give StateTransferManagerImpl.stop() a priority of 0, so that the CacheTopologyControlCommand(LEAVE) comand is sent as soon as possible.

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              dberinde@redhat.com Dan Berindei
              dberinde@redhat.com Dan Berindei
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